Table 2.
Age group | Difficulty | Mean (%) | Standard error (%) | 95% Confidence interval |
|
---|---|---|---|---|---|
Lower bound | Upper bound | ||||
Younger | 1-back | 98.26 | 1.27 | 95.67 | 100.86 |
2-back | 89.74 | 3.35 | 82.90 | 96.57 | |
Older | 1-back | 94.16 | 1.54 | 91.02 | 97.29 |
2-back | 75.94 | 4.05 | 67.68 | 84.20 |